ERRATIC OIL PRESSURE

WHEN I TURN IGN. TO ACC OIL PRESSURE PEGS OUT START UP OK. AFTER COUPLE MILES WHEN ACCELERATING GAUGE ERRATIC SOMETIMES ALL WAY TO RIGHT UNTIL EITHER IPUT IN NEUTRAL LET OFF GAS COMPLETELY OR PUT THE THROTTLE TO IT. OIL IS CLEAN DONT SEEM TO BE LEAKS CAR SEEMS TO RUN FINE CHANGED OIL, FILTER 3 TIMES RECENTLY

Replace your oil sending unit, it may have a partial clog or is just out of range. It's usually right near the oil filter, if you can tell me the exact engine size I can look up the location, it's on the white label under the hood in liters!